<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    textarea {
      /* 不可以拉伸 */
      resize: none;
      /* 只能水平拉伸 */
      /* resize: horizontal; */
      /* 只能垂直拉伸 */
      /* resize: vertical; */
    }
  </style>
</head>

<body>
  <form action="/abc">
    <label for="info">
      个人描述:
      <textarea name="info" id="info" cols="30" rows="10"></textarea>
    </label>
    <div>
      <input type="submit">
    </div>
  </form>

</body>

</html>